Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province

Xiamen, China

Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province

Xiamen, China
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Hou W.,Huaqiao University | Hou W.,Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province | Chen B.,Huaqiao University | Chai Z.,Huaqiao University | And 3 more authors.
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2017

As an important energy dissipation component of coupling shear wall system and core tube, the coupling beam played the first seismic line function in the building. Simulating the real boundary condition and the stress state of the coupling beam is difficult to accomplish, so the reversed cyclic loads test of the coupling beam is to become the one of the most difficult structural tests. Scholars of different countries have put forward different loading method to address such issues as keeping the specimen horizontal, aligning to load and soon. This paper summarized the previous loading method and test device, and took the investigation and analysis of the advantages and disadvantages of previous tests, then designed and manufactured a suitable loading device to realize the boundary condition of the coupling beam. Loading device was installed at both sides of the two vertical actuator to ensure the both side of the coupling beam to keep some angle. Load of the vertical actuator is recorded in the process, to analyze the change of loading. Two vertical factors have less influence on the force of test. The reversed cyclic loading test of embedded steel plate reinforced concrete coupling beams was conducted using this loading program. The feasibility and applicability of the loading device are proved. The test results is shown that the loading device can achieve the expected goal and that the data are reliable. The new loading program is an alternative program. © 2017, Editorial Office of Journal of Xi'an University of Architecture & Technology. All right reserved.


Hou W.,Huaqiao University | Hou W.,Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province | Chen B.,Huaqiao University | Chen B.,Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province | And 3 more authors.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2017

To improve the seismic behavior of coupling beams of conventional shear wall in high-rise buildings, three embedded steel plate reinforced concrete composite coupling beams (SPC) and one diagonally reinforced coupling beam was tested under cyclic loading. The variable parameters in tests include longitudinal reinforcement ratios and steel plate forms. The failure process, hysteretic behavior, energy dissipation, strength and stiffness degradation, bearing capacity, ductility and deformation performance were investigated. The failure modes of specimens include bending-shear and bending. Test results indicate that as longitudinal reinforcement ratio of coupling beam increases excessively, the bearing capacity of core walls may increase, but the ductile deformation may reduce. At the same plate ratio, the two specimens embedded with single plate and double decker plate have similar strength and deformation performance. In practice, double decker plate instead of single thick plate can be designed when the thickness of single plate is too large. It was found that embedded steel plates could improve the strength and the ductility of coupling beams. Compared with diagonally reinforced coupling beam, the pinch phenomenon of hysteretic curves was improved obviously. The plate provides greater capacity to resist the bending moment, and enhance rotation capacity of plastic hinge. Consequently, concrete composite coupling beams embedded with steel plate have more stable hysteretic performance and greater energy dissipation capacity, and can be constructed conveniently. Integrated seismic behaviors of SPC coupling beams are superior to those of diagonally reinforced coupling beams. © 2017, Editorial Office of China Civil Engineering Journal. All right reserved.


Guo Z.,Huaqiao University | Guo Z.,Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province | Zhang P.,Jiangxi University of Science and Technology | Mei Z.,Huaqiao University | And 5 more authors.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2015

Experiments were conducted to study the seismic behavior of damaged RC frames retrofitted with friction energy dissipation braces (FEDB) under cyclic loading. The performance of this innovative FEDB and the effect of pre-tightening force of the friction damper on seismic performance of retrofitted frames were studied. Based on the test results, the damage characteristic, strength, stiffness and energy dissipation capacity of all specimens were analyzed. The test results indicate that the innovative friction damper has a desirable hysteretic curve with rectangular shape and the performance of the FEDB is stable under cyclic loading. The seismic performance was greatly improved when the damaged RC frames were retrofitted with the FEDB, and the improvement effect increases with the pre-tightening force of friction dampers. The FEDB is the main energy dissipation component in the retrofitted damaged RC frames under seismic loading. This research results can provide reference for retrofitting of damaged RC frames. ©, 2015, Editorial Office of China Civil Engineering Journal. All right reserved.


Zheng Y.,Huaqiao University | Guo Z.,Huaqiao University | Guo Z.,Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province | Chai Z.,Huaqiao University | And 2 more authors.
Journal of Natural Disasters | Year: 2014

Aiming at the seismic weakness in stone slabs of stone structures, such as poor integrity and insufficient supporting length, a new retrofitting technique of adding reinforced concrete (RC) inner ring beams to stone walls beneath the stone slabs was proposed. Six specimens with RC inner ring beams casted on the flank were fabricated and subjected to eccentric loadings to investigate the bond performance between stone and RC beams. The researched parameters include the amount and surface characteristic of U-shaped anchor bar and influence of the eccentricity on failure patterns and shear bearing capacity. Test results show that, (1) increasing the amount of the U-shaped anchor bars could effectively increase the shear bearing capacity of the specimens; (2) the specimens using ribbed anchor bars have higher shear capacity than the specimens using plain anchor bars; (3) the shear-bearing capacity of the specimens decreases with the increase of the eccentric distance. Based on the test results and mechanism analysis, a formula to calculate the shear-bearing capacity of the interface between stone and RC beams is proposed. This paper could serve as reference for the retrofit of stone slabs.


Hou W.,Huaqiao University | Hou W.,Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province | Guo Z.,Huaqiao University | Guo Z.,Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province
Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering | Year: 2014

For some important building structures, the structural strength and displacement are verified to comply with the codes or standards limits during the performance-based seismic design process. The concrete core wall is the most widely used lateral force resisting system in high-rise buildings in China. The bearing capacity, stiffness and ductility must be detailed design to meet the higher seismic requirements. Using Park-Ang damage index D and capacity design method, base on the acceleration-displacement response spectrum and the basic principle of capacity spectrum, a displacement-based on seismic design method of reinforced concrete core walls is proposed. This method is considered to be useful to develop a more rational seismic design method because the method makes it possible to verify the seismic safely of a structure from both the force and the displacement. Given both the target displacement and the target acceleration of the structure, the seismic design is proceed by the proposed method. And the demand strength and displacement are obtained in any design level earthquake. In addition, in order to ensure that the members of the core walls structure have enough plastic deformation capacity, the reinforcement in detail is designed by capacity design method.

Loading Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province collaborators
Loading Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province collaborators